Huh? Mary was a virgin. But Mary was not a deity. Mary was born a human and died as a human. Jesus was born as a man, tempted as a man and died as a man. He did so to save us the horror of Hell. He was resurrected and ascended into Heaven.
The term “Mother of God” is a loose translation of the term, “Theotokos” — God-bearer.
It is more a statement about the One who was in her womb (the Son, who was both fully man and fully God) than it is about herself (no one believes that she is, say, the source of God Himself).